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Interesting Block I Just Brought


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#1 grizzler73

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Posted 14 April 2018 - 07:15 PM

Hi Chap's
Wondering if you can help, I just got a 11 stud 12G 1279 block off eBay, it has a lot of surface rust and still had the cam fitted. It is stamped on the sprocket end KC MD 276 SB and has a star drive type oil pump, is that Kent 276? Also would this be a good base for my race engine?

Edited by grizzler73, 14 April 2018 - 07:18 PM.


#2 nicklouse

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Posted 14 April 2018 - 07:21 PM

it will be a 276 SP scatter pattern cam, rather mild.  



#3 grizzler73

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Posted 14 April 2018 - 07:27 PM

I suspected as much Nick, nice to know it has been breathed on a bit. I had been looking for a late A series for a while and this was cheap too!

#4 Sprocket

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Posted 14 April 2018 - 07:28 PM

Kent never made a scatter cam with less duration than the MD286SP until they introduced the MD274SP injection cam...........



#5 grizzler73

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Posted 14 April 2018 - 11:02 PM

Also I found a number stamped where the engine plate is normally riveted which is 47XV116493. The block also has a extra lug on the face that takes the waterpump, below and on the left as you look at it. That is missing on my A+ block.

#6 nicklouse

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Posted 14 April 2018 - 11:07 PM

pics pics pics

 

as the A+ has am extra lug over the A.



#7 grizzler73

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Posted 15 April 2018 - 07:11 AM

It looks like this one.
http://www.nonlintec...on/DCP_3838.JPG
It also has the hole in the casting above the centre main.

#8 Retroman

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Posted 15 April 2018 - 01:29 PM

Kent never made a scatter cam with less duration than the MD286SP until they introduced the MD274SP injection cam...........

 

I don't think DV developed it, but Kent did a KCMD276SP...Grizzler73 has one and so have I...

 

I have not measured it as yet, but wonder if the timing is a bit short to see any benefit, but the VP3 works well as scatter, Petrol Pete is going for one in his 998 screamer.

 

#9 grizzler73

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Posted 15 April 2018 - 04:22 PM

It's a bit of a moot point anyway as it is knackered, but interesting non the less.As for the block
I plan to liner it back to standard and tap and split the bosses above the oil scavenge so I can run through my remote oil filter before the pump.

#10 grizzler73

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Posted 16 April 2018 - 01:01 PM

Here is the block, despite appearances it has cleaned up rather well! 

 

Jp7NyxO.jpg?1

 

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jXQNfM1.jpg?1

 

 



#11 Magneto

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Posted 16 April 2018 - 03:34 PM

What does it cost to have liners iinstalled and bored/honed?  Over here it's about $150/hole - so $600 for the block, plus you need it decked and line bored too....it's pretty easy to wind up with $1000 in a block this way!


Edited by Magneto, 16 April 2018 - 03:36 PM.


#12 grizzler73

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Posted 16 April 2018 - 04:47 PM

I see your point, but...
Rob Walker Engineering quote £150 to liner (not sure if that is per cylinder though...) , Liners are between £100 and £150 a set so £300 ish? I think it will pay off in the long run as you are renewing the only bits that do not have a bearing between them. Nobody is making new 12G blocks so preservation is the order of the day. Also with modern liners you will get better life out of your rings and therefore the engine performance should last longer between rebuilds.

#13 Rorf

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Posted 16 April 2018 - 04:47 PM

Good luck with that block :ohno:



#14 nicklouse

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Posted 16 April 2018 - 04:53 PM

Re your block http://www.theminifo...9-engine-block/

#15 grizzler73

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Posted 16 April 2018 - 05:22 PM

Thanks Nick,
From that thread, Mokespider wrote:

There were 3 series in the 1275 block castings pre-A+ that I know of and I'm quite sure, this is one of them.



The early series were thin flange. These are a fairly rare. These were also machine up to take the smaller big end crank, which were thinner across the thrust faces, though it's likely that the last of them were wider, but I'm not 100% sure on this.



Later ones (not long after those ^) were basically the same, but thick flange.



The last of them were similar again to these ^ but the tell tale being an added lump to the casting for the later tensioner type timing chain set up. From the blocks I've had my hands on over the years, these were generally the best of any 1275, A+ included.

Mine has that added lump.

Rorf, what do you mean? Elaborate please.




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